Hydraulic Filtration Technical Reference - Donaldson Company, Inc.

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Technical Reference
Donaldson Filter Media Efficiency Ratings per ISO 16889 Test Standards
ISO 16889 is the international standard for
Multi-Pass Testing to determine the efficiency (beta
rating or beta ratio) and the dirt-holding capacity of
the filter. It replaced the ISO 4572 test standard.
Donaldson filter media has been re-tested per the
new standard and the current beta ratios are shown
at right. New beta ratios are shown at 200 and 1000,
with a (c) to indicate test adherence to the ISO 16889
standard and traceability to NIST test dust.
Fluid to be Recommended
Filtered Media
Petroleum-based ................................Synteq or Cellulose
Phosphate Ester ..............................................DT Synteq
Diester ...................................................................Synteq
Water Glycol ....................................................DT Synteq
Water-Oil Emulsion ................................................Synteq
Biodegradable Fluid ...............................................Synteq
HWCF (high water content fluids) ........................Synteq
Coarse Filtration ..............................................Wire Mesh
Donaldson Filter Media Efficiency Ratings
Per ISO 16889 Test Standards
FORMER
Media Rating NEW Rating NEW Rating
Number Beta X=75 Beta X(C)=200 Beta X(C)=1000
per ISO 4572 per ISO 16889 per ISO 16889
Donaldson Synteq Synthetic Media
No. ½ 2 µm 50 µm (c)
Donaldson DT Synteq Synthetic Media
DT 2µm
DT 5µm
DT 8µm
DT 14µm
N/A
N/A
N/A
N/A
40 µm (c)
No. 25 N/A 32 µm (c) >40 µm (c)
Donaldson Wire Mesh Media
No. 44 45 µm nominal 325 mesh N/A
No. 74 75 µm nominal 200 mesh N/A
No. 149 150 µm nominal 100 mesh N/A
Donaldson Water Absorbing Media
WA N/A >30 µm(c) >30 µm(c)
Hydraulic Filtration • 339
HYDRAULIC FILTRATION - TECHNICAL REFERENCE